Grid Issue - Values are one row off

I have the following bug in my grid… in OnRecord I have the following code:

{Lost Hours} = {Target Hours};

And I get the following… WHY does it double the value in Jan and Feb and then throw off the rest of the data. Any idea??
This is my SQL Select Statement:
SELECT
Month(TS_WeekEndDate) as Month,
TS_UserID,
TS_ID
FROM
tblTimeSchedule
WHERE Year(TS_WeekEndDate) = 2023
GROUP BY
Month(TS_WeekEndDate)

I have Month as a field that does manual lookup into Jan, Feb, etc.

Hello! Did you solve this issue? I’m struggling with something similar

Cul problema tiene Erikita?

Could be a data issue… hard to tell from here.
Does it work fine if you run it in SQL?

Have you echoed out the values of {Lost Hours} and {Target Hours} ?